【題目】Emergency line operators must always calm and make sure that they get all the information they need to send help.

A. grow

B. appear

C. become

D. stay

【答案】D

【解析】句意：急診熱線的接線員們必須一直保持冷靜并確保得到他們所需的所有信息以便派出救助。grow/become變得；appear顯得；stay保持。

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